Make a few helmfile sub-commands consistently support needs-related flags (#78)

* Make a few helmfile sub-commands to consistently support needs-related flags

* helmfile-diff adds support for --include-transitive-needs
* helmfile-template adds support for --skip-needs
* helmfile-lint adds support for --skip-needs, --include-needs, and --include-transitive-needs

Ref https://github.com/roboll/helmfile/issues/2055

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix a few helmfile-lint needs related bugs and add tests

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Is include-transitive-needs realy working as intended? 🤔

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Confirm that it does fail on unselected need by default

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Add missing testdata

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Test helmfile-template for include/skip needs support

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix a few terms

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Add more tests to better know the current helmfile-diff behavior around needs

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix failing tests

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix helmfile-diff to consistently handle skip/include-needs

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Extract testhelper.RequireLog for reusing

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix all bugs and test cases for TestDiff and TestDiff_2

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix TestDiff_2

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix TestDiff

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix TestDiffWithNeeds

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Unify behavior on including disabled releases as needs for lint and template

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

* Fix bug that --include-transitive-needs does not imply include-needs

Signed-off-by: Yusuke Kuoka <ykuoka@gmail.com>

pkg/app/testdata/testapply_2/deduplicate_by_--selector/log

@@ -58,10 +58,9 @@ GROUP RELEASES
 1     default/default/foo
 
 processing releases in group 1/1: default/default/foo
-getting deployed release version failed:unexpected list key: {^foo$ --kube-contextdefault--deleting--deployed--failed--pending}
 
 UPDATED RELEASES:
 NAME   CHART           VERSION
-foo    incubator/raw          
+foo    incubator/raw     3.1.0
 
 changing working directory back to "/path/to"

pkg/app/testdata/testapply_2/select_single_release_from_helmfile_with_two_duplicates/log

@@ -62,10 +62,9 @@ GROUP RELEASES
 1     default/default/foo
 
 processing releases in group 1/1: default/default/foo
-getting deployed release version failed:unexpected list key: {^foo$ --kube-contextdefault--deleting--deployed--failed--pending}
 
 UPDATED RELEASES:
 NAME   CHART           VERSION
-foo    incubator/raw          
+foo    incubator/raw     3.1.0
 
 changing working directory back to "/path/to"